with Elevating Legrest and Desk Length Detachable Arms – 16"x16", with Swing Away Footrest and Desk Length Detachable Arms – 16"x16", with Elevating Legrest and Desk Length Detachable Arms – 18"x16", with Swing Away Footrest and Desk Length Detachable Arms – 18"x16", with Elevating Legrest and Desk Length Detachable Arms – 20"x18", with Swing Away Footrest and Desk Length Detachable Arms – 20"x18"